/*
 *    Geotoolkit - An Open Source Java GIS Toolkit
 *    http://www.geotoolkit.org
 *
 *    (C) 2008 - 2009, Geomatys
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation; either
 *    version 2.1 of the License, or (at your option) any later version.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 */
package org.geotoolkit.observation.xml.v100;

// Constellation dependencies
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlSchemaType;
import javax.xml.bind.annotation.XmlType;
import javax.xml.bind.annotation.XmlValue;
import org.geotoolkit.gml.xml.v311.UnitOfMeasureEntry;

// GeotoolKit dependencies
import org.opengis.observation.Measure;


/**
 * Resultat d'une observation de type {linkplain Measurement measurement}.
 *
 * @version $Id:
 * @author Guilhem Legal
 * @module
 */
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "MeasureType")
@XmlRootElement(name = "Measure")
public class MeasureType implements Measure {
    
    /**
     * L'unite de la mesure
     */
    @XmlAttribute(required = true)
    @XmlSchemaType(name = "anyURI")
    private String uom;
    
    /**
     * La valeur de la mesure
     */
    @XmlValue
    private float value;
    
    private static final Map<String, String> idMap = new HashMap<>();
    static {
        idMap.put("°C", "degrees");
        idMap.put("m", "meters");
    }
    /**
     * constructeur vide utilisé par jaxB
     */
    protected MeasureType(){}
    
    /** 
     * crée un nouveau resultat de mesure.
     *
     * @param uom   L'unité de mesure.
     * @param value La valeur mesurée.
     */
    public MeasureType(final UnitOfMeasureEntry uom,
                       final float              value)
    {
        if (uom != null) {
            this.uom   = uom.getUnitsSystem();
        }
        this.value = value;        
    }
    
    public MeasureType(final String uom, final float value) {
        this.uom = uom;
        this.value = value;        
    }

    /**
     * {@inheritDoc}
     *
     * @todo Implementer le retour des unites.
     */
    @Override
    public UnitOfMeasureEntry getUom() {
        if (uom != null) {
            final String id = idMap.get(uom);
            return new UnitOfMeasureEntry(id, null, null, uom);
        }
        return null;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public float getValue() {
        return value;
    }
    
    public void setValue(final float value) {
        this.value = value;
    }
    
     /**
     * Retourne un code représentant ce resultat de mesure.
     */
    @Override
    public int hashCode() {
        int hash = 5;
        hash = 23 * hash + Objects.hashCode(this.uom);
        hash = 23 * hash + Float.floatToIntBits(this.value);
        return hash;
    }

    /**
     * Vérifie si cette entré est identique à l'objet spécifié.
     */
    @Override
    public boolean equals(final Object object) {
        if (object == this) {
            return true;
        }
        
        if (object instanceof MeasureType) {
            final MeasureType that = (MeasureType) object;
            return Objects.equals(this.uom,   that.uom) &&
                   Objects.equals(this.value, that.value) ;
        }
        return false;
    }

    
    /**
     * Retourne une description de l'objet (debug).
     */
    @Override
    public String toString() {
        StringBuilder s = new StringBuilder();
        if (uom != null) {
            s.append("uom =").append(uom).append('\n');
        }
        
        s.append(" value=").append(value).append('\n');
        
        return  s.toString();
    }
    
}